Before making his fourth feature film, the action revenge thriller One Spoon of Chocolate, legendary rapper and music producer RZA was still, he confesses, unsure of himself as a filmmaker, feeling that he hadn’t yet mastered the process, the “rhythms” as he calls it, of being a director, at least not to the same comfort level he had with music. After scaling the heights of hip hop as the de facto head of the Wu-Tang Clan, arguably the most influential rap group in history, RZA has found increasing success in film and television, firstly as an actor — he has...